What are conditions like inside a puppy farm?

Panorama investigates the ruthless world of the dog trade. Using secret filming it has uncovered some shocking truths about where and how these animals are bred - including the conditions inside puppy farms that breed dogs for the UK market.

Panorama - Britain's Puppy Dealers Exposed is broadcast on BBC One on Monday 16 May at 19:30 BST. Or catch up afterwards on BBC iPlayer